Removal and installation of valves (DOHC engine)

Attention: If valve drive parts are to be reused, they must be reinstalled in their original locations. In order not to frighten the details in places, it is recommended to prepare an appropriate laying board.

Withdrawal

Remove the cylinder head and lay it on 2 wooden blocks so as not to accidentally damage the open valves, see p. 16.

Pull the poppet tappets out of the cylinder head and stow or mark them so that they can be reinstalled in their original positions during reassembly.



In accordance with the figure, make a retaining plate from a steel sheet 6 mm thick.



Make a retaining plate -C- and, as shown in the figure, screw it with a nut on the stud securing the camshaft bearing cover. Attach a special tool FORD 212-024 -A- and 21-024-04 -B-, compress the valve spring with it and remove crackers from the valve stem. To ensure that the valve does not go down when the crackers are removed, place a wooden block in the combustion chamber of the cylinder head.

Attention: When pressing the spring plate to remove the cotters, do not damage the valve stem. If the stem is damaged, the valve must be replaced, as a damaged rod wears out quickly.

Release the valve spring, remove the spring plate and valve spring.

Remove the rest of the valves in the same way.

Remove the valve from the cylinder head, remove the valve stem seal, see next chapter.

Installation

If the old valves and the old cylinder head are installed, the valve guides must be checked before reassembly. If new valves are installed in the old cylinder head, it is first necessary to finish the valve seats in the cylinder head and grind the valves.

Clean the valves from existing deposits with a scraper and a wire brush.

Remove burrs from the valve stems at the contact surfaces of the crackers.

Valve stems and valve guides are easy to lubricate with SAE 80/90 hypoid oil (transmission oil) and insert valves

Use new valve stem seals. see next chapter.

Install the spring and upper spring plate onto the valve.

Using a special tool FORD 212-024 and 21-024-04, compress the valve springs, insert crackers, and then release the springs.

Attention: Do not interchange inlet and outlet valves.

Lubricate the bucket tappets with oil and install in the same holes in which they were before removal.

Install the cylinder head see p. 16.